Pumps, oral irrigators, oral cleaners and eccentric members

Abstract

The present disclosure relates to a pump, an oral irrigator, an oral cleaner and an eccentric member. The pump includes: a housing, a displacement mechanism and an eccentric member. A housing cavity is formed in the housing, and an intermediate plate is fixedly arranged in the housing; the displacement mechanism is arranged in the housing cavity; the end face of the displacement mechanism facing the first direction and the intermediate plate are enclosed to form a fluid pumping cavity with a variable volume; the eccentric member is arranged in the housing cavity and is constructed to be transmission-connected with the end face of the displacement mechanism facing the second direction; the eccentric member is constructed to rotate around the rotation center line under the drive of the output shaft of the driving mechanism, driving the displacement mechanism to reciprocate along the first direction and the second direction to periodically increase and decrease the volume of the fluid pumping cavity; the center of mass of the eccentric member is located on the output shaft. The present disclosure prevents the eccentric member from generating unbalanced centrifugal force during rotation, thereby reducing the deflection of the output shaft of the driving mechanism of the pump.

Description

Technical Field

[0001] The present disclosure relates to the field of water pumps, and in particular to a pump. The present disclosure also relates to a water flosser, an oral cleaner and an eccentric component. Background Art

[0002] In the prior art, diaphragm pumps are used in many devices to achieve the effect of fluid pulses. An eccentric wheel is provided inside the diaphragm pump, thereby realizing the change of the volume chamber inside the pump. When the pulse pump is working, the eccentric wheel will generate unbalanced centrifugal force, which will increase the operating load and vibration, especially when the motor is running at high speed, the unbalanced force will be greater. This causes uneven force on the motor axle and increased concentricity, thereby increasing the friction resistance of the axle, increasing heat generation, and increasing motor vibration noise. The above structure also makes the bearings in the pump prone to expansion during operation, increasing the failure rate.

[0003] In summary, how to reduce the runout of the motor output shaft of the pulse pump is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the present disclosure provides a pump, an oral irrigator, an oral cleaner and an eccentric component.

[0005] According to a first aspect of the present disclosure, there is provided a pump, comprising:

[0006] A housing, wherein a receiving cavity is formed in the housing; an intermediate plate is fixedly disposed in the housing;

[0007] A displacement mechanism is arranged in the accommodating cavity; an end surface of the displacement mechanism facing the first direction and the middle plate enclose a fluid pumping cavity with a variable volume;

[0008] an eccentric member, arranged in the accommodating chamber, and configured to be drivingly connected to the end face of the displacement mechanism facing the second direction; the eccentric member is configured to rotate around the rotation center line under the drive of the output shaft of the driving mechanism, and drive the displacement mechanism to reciprocate along the first direction and the second direction, so as to periodically increase and decrease the volume of the fluid pumping chamber;

[0009] The center of mass of the eccentric member is located on the output shaft.

[0010] In one embodiment of the present disclosure, the center of mass of the eccentric member is substantially located on the axis of the output shaft.

[0011] In one embodiment of the present disclosure, among the planes including the rotation center line, at least one plane is a longitudinal section, so that the masses of the parts of the eccentric member located on both sides of the longitudinal section are substantially the same.

[0012] In one embodiment of the present disclosure, among the planes including the rotation center line, at least one plane is a symmetry plane, so that the eccentric component is arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane.

[0013] In one embodiment of the present disclosure, the eccentric member is an eccentric wheel, and the eccentric wheel is constructed to include a first component and a second component located on both sides of the longitudinal section, and the center of the eccentric wheel is located at the second component:

[0014] The first component is configured to have a material addition; and / or,

[0015] The second component is configured to have a removal chute.

[0016] In one embodiment of the present disclosure, a plurality of the material removal grooves are provided, and the plurality of the material removal grooves are configured to be arranged on the second component at intervals along the circumferential direction of the eccentric wheel; and / or,

[0017] The material removal trough is constructed as a fan-shaped ring concentric with the eccentric wheel; and / or,

[0018] The material removal trough is constructed in a fan-shaped ring shape with a central angle of 90 degrees.

[0019] In one embodiment of the present disclosure, the material adding member is configured to be arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane; and / or,

[0020] The material removal trough is constructed to be mirror-symmetrical with the symmetry plane as a reference plane.

[0021] In one embodiment of the present disclosure, the second component has a first material removal groove, and the first material removal groove is configured to be arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane; and / or,

[0022] The second component has a second material removal groove partially located in the first component, and the second material removal groove is constructed to be mirror-symmetrically arranged with the symmetry plane as a reference plane.

[0023] In one embodiment of the present disclosure, the first chute is configured to be concentric with the eccentric wheel; and / or,

[0024] The second removal chute is configured to be concentric with the eccentric wheel; and / or,

[0025] The first material removal trough is configured in a fan-shaped shape; and / or,

[0026] The second material removal trough is configured in a fan-shaped ring shape; and / or,

[0027] The first material removal trough is constructed in a fan-shaped ring shape with a central angle of 90 degrees; and / or,

[0028] The second material removal trough is constructed in a fan-shaped ring shape with a central angle of 90 degrees.

[0029] In one embodiment of the present disclosure, the material increasing member includes a material increasing block which is arranged on the first component and extends outwardly along the outer circumference of the eccentric wheel.

[0030] In one embodiment of the present disclosure, the material increasing block is constructed as a fan-shaped ring concentric with the eccentric wheel; and / or,

[0031] The material increasing block is constructed in a sector ring shape with a central angle of 90 degrees.

[0032] In one embodiment of the present disclosure, the material adding blocks include a plurality of:

[0033] Among the plurality of material increasing blocks, at least two have different radii; and / or,

[0034] Among the plurality of material increasing blocks, at least two have different thicknesses along the extending direction of the rotation center line.

[0035] In one embodiment of the present disclosure, at least one slot is provided on the material increasing block, and a counterweight block is embedded in the slot; the specific gravity of the counterweight block is configured to be greater than that of the material increasing block and / or the eccentric wheel.

[0036] In one embodiment of the present disclosure, a connecting rod and a bearing are further provided in the housing; the bearing is constructed to be sleeved on the eccentric wheel; the connecting rod is constructed to be transmission-connected between the displacement mechanism and the eccentric wheel, and is constructed to drive the displacement mechanism to reciprocate along the first direction and the second direction under the driving action of the eccentric wheel.

[0037] In one embodiment of the present disclosure, there are two material increasing blocks, which are respectively recorded as a first material increasing block and a second material increasing block; the radius of the first material increasing block is greater than that of the second material increasing block;

[0038] A first step groove is formed between the first material increasing block and the second material increasing block; the connecting rod is configured to be located at a position corresponding to the first step groove;

[0039] A second step groove is formed between the second material increasing block and the first component; and the bearing is located at a position corresponding to the second step groove.

[0040] According to a second aspect of the present disclosure, there is also provided an oral irrigator, comprising:

[0041] A grip shell, wherein an end of the grip shell is connected to a nozzle;

[0042] A water storage unit, disposed in the grip shell;

[0043] A driving mechanism, disposed in the holding shell;

[0044] The pump according to the first aspect of the present disclosure is arranged in the gripping housing; the pump comprises a water inlet channel and a water outlet channel connected to the fluid pumping chamber, the nozzle is connected to the water outlet channel, and the water outlet of the water storage unit is connected to the water inlet channel;

[0045] Under the action of the driving mechanism, the volume of the fluid pumping chamber is configured to increase and decrease periodically, so that the liquid in the water storage unit is pumped into the fluid pumping chamber through the water inlet channel and provides impact fluid through the water outlet channel.

[0046] According to a third aspect of the present disclosure, there is also provided an oral cleaning device, comprising:

[0047] A grip shell, the end of which is connected with a nozzle and a brush head;

[0048] A water storage unit, disposed in the grip shell;

[0049] A brush head driving unit, wherein the brush head driving unit is configured to drive the brush head to oscillate so as to clean the teeth;

[0050] A driving mechanism, disposed in the holding shell;

[0051] The pump according to the first aspect of the present disclosure is arranged in the gripping housing; the pump comprises a water inlet channel and a water outlet channel connected to the fluid pumping chamber, the nozzle is connected to the water outlet channel, and the water outlet of the water storage unit is connected to the water inlet channel;

[0052] Under the action of the driving mechanism, the volume of the fluid pumping chamber is configured to increase and decrease cyclically, so that the liquid in the water storage unit is pumped into the fluid pumping chamber through the water inlet channel and provides impact fluid through the water outlet channel.

[0053] According to a fourth aspect of the present disclosure, an eccentric member is further provided, wherein an axial hole is provided on the eccentric member; and the center of mass of the eccentric member is located within the range of the axial hole.

[0054] One beneficial effect of the present disclosure is that the center of mass of the eccentric member of the pump is set on the output shaft, so that the eccentric member does not generate unbalanced centrifugal force during rotation, thereby reducing the deflection of the output shaft of the drive mechanism. The output shaft of the drive mechanism is subjected to uniform force, thereby reducing its friction resistance, heat generation, and vibration noise. In addition, the pump is also provided with a bearing, which is no longer subjected to unbalanced centrifugal force during operation, so it is no longer prone to hole expansion, and the failure rate of the bearing is reduced.

[0055] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0057] Figure 1 is a partial cross-sectional view of a pump and a driving mechanism provided by an embodiment of the present disclosure;

[0058] Figure 2 is a top view of an eccentric wheel provided in one embodiment of the present disclosure;

[0059] Figure 3 is a three-dimensional diagram of an eccentric wheel provided in one embodiment of the present disclosure;

[0060] Figure 4 It is an angle diagram of a material increasing block in an eccentric wheel provided in an embodiment of the present disclosure;

[0061] Figure 5 It is a diagram showing the angles of the material removal slot in the eccentric wheel provided in one embodiment of the present disclosure;

[0062] Figure 6 is a cross-sectional view of an eccentric wheel provided in one embodiment of the present disclosure;

[0063] Figure 7 is a three-dimensional exploded view of an eccentric wheel provided by another embodiment of the present disclosure;

[0064] Figure 8 is a top view of an eccentric wheel provided in another embodiment of the present disclosure;

[0065] Fig. 9 is a schematic structural diagram of an oral irrigator provided by an embodiment of the present disclosure;

[0066] Fig.10 is a structural schematic diagram of an oral cleaner provided by an embodiment of the present disclosure;

[0067] Fig.11 is a cross-sectional view of a pump and a driving mechanism provided in one embodiment of the present disclosure.

[0068] Figures 1 to 11 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0069] 100. Pump; 1. Shell; 10. Accommodating chamber; 11. Intermediate plate; 2. Displacement mechanism; 20. Fluid pumping chamber; 3. Eccentric wheel; 31. First component; 310. Material increasing block; 311. First material increasing block; 312. Second material increasing block; 313. Slot; 314. Counterweight block; 315. First step groove; 316. Second step groove; 32. Second component; 321. First material removal trough; 322. Second material removal trough; 33. Shaft hole; 4. Connecting rod; 5. Bearing; 61. First bearing; 62. Second bearing; 7. Water inlet channel; 8. Water outlet channel; 200. Driving mechanism; 210. Output shaft; 300. Holding shell; 400. Water storage unit; 500. Nozzle; 600. Brush head; 700. Brush head driving unit. DETAILED DESCRIPTION

[0070] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0071] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0072] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0073] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0074] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0075] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0076] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0077] Embodiment 1

[0078] refer to Figure 1 and Fig.11The present embodiment provides a pump 100. Specifically, the pump 100 may be a diaphragm pump, which may be widely used in various industrial fields to transport fluid media. The pump 100 includes: a housing 1, a displacement mechanism 2, and an eccentric member, wherein Figure 1 As shown, a receiving chamber 10 is formed in the housing 1. The receiving chamber 10 is enclosed by the housing 1 and can be used to accommodate various structures and components inside the pump 100. Fig.11 As shown, an intermediate plate 11 is fixedly arranged inside the shell 1 . The intermediate plate 11 can be used as a part of the internal structure of the shell 1 , thereby being integrally formed with the shell 1 . The intermediate plate 11 can also be used as a part fixedly installed inside the shell 1 .

[0079] The displacement mechanism 2 is arranged in the accommodating cavity 10. Fig.11 As shown, the end surface of the displacement mechanism 2 facing the first direction and the middle plate 11 enclose a fluid pumping chamber 20 with a variable volume. Fig.11 The left side indicated by the arrow is the first direction, and the right side opposite to the first direction is the second direction. The displacement mechanism 2 includes a diaphragm, and the end surface of the diaphragm facing the first direction can be enclosed with the middle plate 11 to form a fluid pumping chamber 20 with a variable volume.

[0080] The fluid pumping chamber 20 formed by the displacement mechanism 2 and the middle plate 11 is separated from the accommodating chamber 10 and is independently arranged. The fluid can only enter the fluid pumping chamber 20 and will not flow into the accommodating chamber 10, thereby forming a dry-wet separation inside the pump 100, and the fluid will not affect the structure inside the accommodating chamber 10.

[0081] In one embodiment of the present disclosure, reference Figure 1 and Fig.11 The housing 1 is provided with a water inlet channel 7 and a water outlet channel 8, which can be connected to the upper and lower sides of the fluid pumping chamber 20, respectively. The fluid can flow into the fluid pumping chamber 20 from the water inlet channel 7. During the process of the volume change of the fluid pumping chamber 20, the pressure inside the fluid pumping chamber 20 will change, so that the fluid can be pumped out from the water outlet channel 8 by pressure.

[0082] The eccentric member is disposed in the accommodating chamber 10. In a specific embodiment of the present disclosure, the eccentric member may be an eccentric wheel 3. The eccentric member is configured to be in driving connection with the end face of the displacement mechanism 2 facing the second direction. The eccentric member is configured to rotate around the rotation center line under the drive of the output shaft 210 of the driving mechanism 200, driving the displacement mechanism 2 to reciprocate in the first direction and the second direction, so as to periodically increase and decrease the volume of the fluid pumping chamber 20.

[0083] The drive mechanism 200 may be a motor, such as a DC motor, an inner rotor brushless DC motor, an outer rotor brushless DC motor, etc. The output shaft 210 of the drive mechanism 200 may be provided with knurling to better fasten the eccentric wheel 3. Figure 2 As shown, the eccentric wheel 3 is provided with an axial hole 33 deviating from its geometric center, and the rotation center line of the eccentric wheel 3 is the central axis of the axial hole 33. Figure 1 As shown, the output shaft 210 passes through the shaft hole 33. When the driving mechanism 200 is working, the output shaft 210 can drive the eccentric wheel 3 to rotate around the rotation center line.

[0084] In one embodiment of the present disclosure, reference Figure 1 The output shaft 210 penetrates into the housing 1 of the pump 100. A first bearing 61 is provided between the output shaft 210 and the top cover of the housing 1. The first bearing 61 may be an oil-containing bearing, which can reduce the friction between the output shaft 210 and the housing 1, thereby improving the smoothness of the rotation of the output shaft 210. A second bearing 62 may be provided between the housing of the drive mechanism 200 and the output shaft 210. The second bearing 62 can reduce the friction between the output shaft 210 and the housing of the drive mechanism 200, thereby improving the smoothness of the rotation of the output shaft 210.

[0085] In one embodiment of the present disclosure, reference Figure 1 and Fig.11 A connecting rod 4 is also provided in the housing 1. The connecting rod 4 is configured to be transmission-connected between the displacement mechanism 2 and the eccentric wheel 3, and is configured to drive the displacement mechanism 2 to reciprocate along the first direction and the second direction under the driving action of the eccentric wheel 3. One end of the connecting rod 4 can be transmission-connected to the eccentric wheel 3, and when the eccentric wheel 3 rotates, it can drive the connecting rod 4 to reciprocate along the first direction and the second direction. The other end of the connecting rod 4 extends in the direction of the displacement mechanism 2 and is connected to the end face of the displacement mechanism 2 facing the second direction. During the reciprocating movement of the connecting rod 4, it can drive the displacement mechanism 2 to periodically increase or decrease the volume of the fluid pumping chamber 20 with the same stroke as the connecting rod 4.

[0086] When the eccentric wheel 3 drives the displacement mechanism 2 to move in the first direction, the volume of the fluid pumping chamber 20 decreases; when the eccentric wheel 3 drives the displacement mechanism 2 to move in the second direction, the volume of the fluid pumping chamber 20 increases. The volume of the fluid pumping chamber 20 changes periodically with the rotation of the eccentric wheel 3, and a pulse fluid with a certain impact can be pumped out from the water outlet channel 8.

[0087] In one embodiment of the present disclosure, Figure 1As shown, a bearing 5 is also provided in the housing 1, and the bearing 5 is configured to be sleeved on the eccentric wheel 3. The bearing 5 may be a ball bearing, which is provided between the eccentric wheel 3 and the connecting rod 4, thereby reducing the friction between the eccentric wheel 3 and the connecting rod 4. The bearing 5 prevents the eccentric wheel 3 from driving the connecting rod 4 to rotate coaxially, and ensures that the connecting rod 4 can perform periodic motion in a direction perpendicular to the rotation center line.

[0088] In a specific embodiment of the present disclosure, the pump 100 can be applied to a micro-sized device, so the size of the pump 100 needs to be reduced as a whole. The position where the connecting rod 4 is connected to the displacement mechanism 2 has two extreme positions close to or away from the rotation center line during the reciprocating motion, and the distance between the two extreme positions can be in the range of 2.1mm to 2.6mm. The volume of the fluid pumping chamber 20 is 120mm 3 Up to 165mm 3 within the range.

[0089] The preferred maximum stroke of the displacement mechanism 2 can be 2.4 mm. If the stroke is too small, the pumping force will be weakened, the water flow rate will be insufficient, and the requirement of fluid impact force cannot be met; if the stroke is too large, the requirement of reducing the overall design size of the pump 100 cannot be met. In this embodiment, the outer diameter of the eccentric wheel 3 can be 6 mm, the size of the bearing 5 can be 10 mm in outer diameter, 6 mm in inner diameter, and 3 mm in height, and the outer diameter of the drive mechanism 200 can be 22 mm.

[0090] When the pump 100 is working, the eccentric wheel 3 will generate unbalanced centrifugal force, thereby increasing the operating load and vibration. The rotating eccentric wheel 3 makes the output shaft 210 unevenly stressed, the friction resistance increases, the heat generation increases, and the drive mechanism 200 is prone to vibration noise. In addition, the bearing 5 sleeved on the outside of the eccentric wheel 3 is prone to expansion, and the failure rate increases. The first bearing 61 and the second bearing 62 matched with the output shaft 210 are prone to wear and shorten their service life.

[0091] In order to solve the above problems, the center of mass of the eccentric member of the present invention is located on the output shaft 210. It can be understood that the center of mass of the eccentric wheel 3 is located on the output shaft 210, and the centrifugal force generated when it rotates tends to be balanced. The eccentric wheel 3 will not generate unbalanced centrifugal force during the rotation process, thereby reducing the swing amount of the output shaft 210 of the drive mechanism 200. The output shaft 210 of the drive mechanism 200 is subjected to uniform force, thereby reducing its friction resistance, heat generation, and vibration noise. In addition, the bearing 5 sleeved on the eccentric wheel 3 will no longer be subjected to unbalanced centrifugal force during operation, so it is no longer prone to hole expansion, and the failure rate of the bearing 5 is reduced. The first bearing 61 and the second bearing 62 that cooperate with the output shaft 210 have reduced wear and extended service life.

[0092] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 , the center of mass of the eccentric member is basically located on the axis of the output shaft 210. The axis of the output shaft 210 basically coincides with the rotation centerline of the eccentric wheel 3, and the center of mass of the eccentric wheel 3 is basically located on its rotation centerline, thereby balancing the centrifugal force generated during its rotation. It should be noted that due to production and assembly errors, it cannot be guaranteed that the center of mass of the eccentric wheel 3 will definitely fall on the axis of the output shaft 210, but may be at other positions within the error range. The maximum distance between the center of mass of the eccentric wheel 3 and the axis of the output shaft 210 does not exceed the radius of the shaft hole 33, thereby ensuring the balance of the centrifugal force when the eccentric wheel 3 rotates.

[0093] In one embodiment of the present disclosure, among the planes including the rotation centerline, at least one plane is a longitudinal section, so that the mass of the components of the eccentric member located on both sides of the longitudinal section is substantially the same. It can be understood that the planes including the rotation centerline can all be sections of the eccentric wheel 3, and the present disclosure defines the sections with the same mass on both sides as longitudinal sections. Specifically, Figure 2 As shown, the plane defined by line A and the rotation center line is the longitudinal section, which divides the eccentric wheel 3 into two parts with substantially the same mass.

[0094] Specifically, the eccentric wheel 3 is constructed to include a first component 31 and a second component 32 located on both sides of the longitudinal section, and the center of the eccentric wheel 3 is located at the second component 32. When the eccentric wheel 3 is a cylinder with uniform texture and no material is added or removed from the eccentric wheel 3, the volume of the second component 32 with the center is larger than the first component 31, so its mass is also larger than the first component 31. In order to make the masses of the first component 31 and the second component 32 substantially the same, it is necessary to increase the mass of the first component 31 and / or reduce the mass of the second component 32.

[0095] In one embodiment of the present disclosure, reference Figure 2 and Figure 3 The first component 31 is configured to have a material increasing member, and / or the second component 32 is configured to have a material removal groove. The material increasing member may be a counterweight heavier than the eccentric wheel 3, or may be a material increasing block 310 with the same specific gravity as the eccentric wheel 3.

[0096] Specifically, the material increasing member includes a material increasing block 310 which is arranged on the first component 31 and extends outward along the outer circumference of the eccentric wheel 3. The material increasing block 310 can be fixed on the outer circumferential side wall of the eccentric wheel 3, or can be integrally formed with the eccentric wheel 3. The material increasing block 310 can have the same specific gravity as the eccentric wheel 3. The present disclosure increases the mass of the first component 31 by arranging the material increasing block 310, thereby balancing the mass of the first component 31 and the second component 32.

[0097] In one embodiment of the present disclosure, reference Figure 4 , the material adding block 310 is constructed as a fan ring shape concentric with the eccentric wheel 3; and / or, the material adding block 310 is constructed as a fan ring shape with a central angle of 90 degrees. The top view of the material adding block 310 in this embodiment is a fan ring shape with a central angle of 90 degrees and concentric with the eccentric wheel 3. Figure 4 As shown, the included angle between the two end edges of the material adding block 310 is 90 degrees.

[0098] like Figure 4 As shown, a small portion of the material adding block 310 extends beyond the position of the first component 31 bounded by the longitudinal section shown by line A, that is, a small portion of the material adding block 310 extends to the position where the second component 32 is located. Specifically, a line C passing through the center of the eccentric wheel 3 can be used as a parallel plane of the longitudinal section, which is recorded as the center plane; Figure 4 In the viewing direction, the first component 31 is completely located on the left side of the center plane, the second component 32 is partially located on the left side of the center plane, and the right side of the center plane all belongs to the second component 32. The material increasing block 310 is arranged on the left side of the center plane, and its two end edges form a 45 degree angle with the center plane.

[0099] In one embodiment of the present disclosure, reference Figure 3 and Figure 6 There are multiple material adding blocks 310, and among the multiple material adding blocks 310, at least two have different radii; and / or, among the multiple material adding blocks 310, at least two have different thicknesses along the extension direction of the rotation centerline. Multiple material adding blocks 310 with different radii and thicknesses can be respectively arranged on the outer peripheral wall of the eccentric wheel 3. It can be understood that the space inside the pump 100 is very small, and structures such as the bearing 5 and the connecting rod 4 need to be closely arranged therein. The shape of the eccentric wheel 3 after material addition may conflict with other components, so the shape of the eccentric wheel 3 after material addition needs to be designed to make the spatial layout inside the pump 100 more compact and reasonable.

[0100] In a specific embodiment of the present disclosure, reference Figure 1 and Figure 6 There are two material increasing blocks 310, which are respectively recorded as the first material increasing block 311 and the second material increasing block 312. Figure 6As shown, the radius of the first material adding block 311 is greater than that of the second material adding block 312, and the first material adding block 311 can be located above the second material adding block 312. The first material adding block 311 and the second material adding block 312 are configured to form a first step groove 315, and the connecting rod 4 is configured to be located at a position corresponding to the first step groove 315; the second material adding block 312 and the first component 31 are configured to form a second step groove 316, and the bearing 5 is configured to be located at a position corresponding to the second step groove 316. In this embodiment, the material adding block 310 is set to a two-step shape, thereby reserving assembly space for the connecting rod 4 and the bearing 5 respectively. The internal space of the pump 100 provided in this embodiment is compactly arranged, and there is only a certain assembly gap between the various components, without causing additional space waste.

[0101] As mentioned above, the present embodiment provides a material removal groove on the second component 32, that is, removes part of the material on the second component 32 of the eccentric wheel 3. The present disclosure reduces the mass of the second component 32 by providing the material removal groove, thereby balancing the mass of the first component 31 and the second component 32.

[0102] In one embodiment of the present disclosure, reference Figure 2 , Figure 3 and Figure 5 There may be a plurality of de-materialing grooves on the second component 32, and the plurality of de-materialing grooves are configured to be spaced apart on the second component 32 along the circumferential direction of the eccentric wheel 3; and / or the de-materialing groove is configured to be a fan-shaped ring concentric with the eccentric wheel 3; and / or the de-materialing groove is configured to be a fan-shaped ring with a central angle of 90 degrees.

[0103] Specifically, in this embodiment, array-type grooves are dug and removed on the right side of the longitudinal section of the eccentric wheel 3, and a total of three grooves are provided. Figure 5 As shown, three material removal grooves are arranged on the second component 32 at intervals along the circumferential direction of the eccentric wheel 3, and the three material removal grooves are all constructed as fan rings with a central angle of 90 degrees and concentric with the eccentric wheel 3. In order to ensure the effect of reducing the mass of the second component 32, the depth of the material removal groove is at least 2.8 mm.

[0104] Further, refer to Figure 2 , among the planes containing the rotation center line, at least one plane is a symmetry plane, so that the eccentric component is arranged in mirror symmetry with the symmetry plane as the reference plane. The present disclosure defines the symmetry plane of the eccentric wheel 3 as the symmetry plane, and the center of the eccentric wheel 3 can be located on the symmetry plane. Specifically, Figure 2 As shown, the plane defined by line B and the rotation center line is the symmetry plane, which intersects the longitudinal section perpendicularly, and divides the eccentric wheel 3 into two mirror-symmetrical parts. The present disclosure sets the eccentric wheel 3 as an axisymmetric structure, thereby further improving the balance of the eccentric wheel 3, thereby reducing the deflection of the output shaft 210.

[0105] In one embodiment of the present disclosure, the material adding member is configured to be mirror-symmetrically arranged with the symmetry plane as the reference plane; and / or the material removing trough is configured to be mirror-symmetrically arranged with the symmetry plane as the reference plane. The eccentric wheel 3 and the material adding member and the material removing trough arranged on the eccentric wheel 3 are configured to be mirror-symmetrically arranged with the symmetry plane as the reference plane, so that the eccentric wheel 3 can still maintain an axially symmetrical structure after the first component 31 and the second component 32 are respectively increased and reduced in material, thereby ensuring the balance of the eccentric wheel 3.

[0106] In a specific embodiment of the present disclosure, Figure 5 As shown, the second component 32 has a first material removal groove 321, which is constructed to be mirror-symmetrically arranged with the symmetry plane as the reference plane; and / or, the second component 32 has a second material removal groove 322 partially located in the first component 31, and the second material removal groove 322 is constructed to be mirror-symmetrically arranged with the symmetry plane as the reference plane.

[0107] The first material removal groove 321 is configured to be concentric with the eccentric wheel 3; and / or, the first material removal groove 321 is configured to be fan-shaped; and / or, the first material removal groove 321 is configured to be fan-shaped with a central angle of 90 degrees. In this embodiment, the first material removal groove 321 can be a fan-shaped groove with a central angle of 90 degrees and concentric with the eccentric wheel 3, and the extension lines of its two end edges form an angle of 45 degrees with the symmetry plane.

[0108] The second material removal trough 322 is constructed to be concentric with the eccentric wheel 3; and / or, the second material removal trough 322 is constructed to be fan-shaped; and / or, the second material removal trough 322 is constructed to be fan-shaped with a central angle of 90 degrees. In this embodiment, two second material removal troughs 322 can be provided, and the two second material removal troughs 322 are respectively located on both sides of the symmetry plane. The second material removal trough 322 can be a fan-shaped groove with a central angle of 90 degrees and concentric with the eccentric wheel 3, and the groove volume of the second material removal trough 322 is smaller than that of the first material removal trough 321.

[0109] Embodiment 2

[0110] This embodiment also provides a pump, which is different from the first embodiment in that the material adding method of the first component 31 of the eccentric wheel 3 is different. The other structures and working principles of the pump 100 are exactly the same as those of the first embodiment, and will not be described in detail in this embodiment.

[0111] refer to Figure 7 and Figure 8 In this embodiment, at least one slot 313 is provided on the material increasing block 310, and a counterweight block 314 is embedded in the slot 313. The specific gravity of the counterweight block 314 is configured to be greater than that of the material increasing block 310 and / or the eccentric wheel 3. Specifically, three slots 313 of the same size can be provided on the material increasing block 310, and the three slots 313 are mirror-symmetrically arranged with the symmetry plane as the reference plane. Figure 8In the viewing direction, the three slots 313 are all located on the left side of the longitudinal section, that is, on the first component 31. The slots 313 can be constructed as fan-shaped slots concentric with the eccentric wheel 3.

[0112] When the space inside the pump 100 is very small, the volume of the material increasing block 310 arranged on the outer wall of the eccentric wheel 3 is limited. If the volume of the material increasing block 310 has reached the maximum value and still cannot balance the masses of the first component 31 and the second component 32, a counterweight block 314 with a larger specific gravity can be added to the first component 31.

[0113] A counterweight block 314 may be embedded in each slot 313, and the specific gravity of the counterweight block 314 is greater than that of the material increasing block 310 and / or the eccentric wheel 3, thereby increasing the weight of the first component 31 without increasing the volume of the eccentric wheel 3. For example, when the eccentric wheel 3 and the material increasing block 310 are both made of a plastic material with a relatively small specific gravity, an iron counterweight block 314 with a relatively large specific gravity may be embedded in the slot 313, thereby balancing the mass of the first component 31 and the second component 32.

[0114] Embodiment 3

[0115] This embodiment provides an oral irrigator, and the pump 100 provided in the first or second embodiment can be applied to the oral irrigator provided in this embodiment. An oral irrigator is an irrigating device that can effectively remove bacteria and food residues on the tooth surface and in the gaps between teeth, and specifically, can be a tooth rinser.

[0116] refer to Fig. 9 The oral irrigator includes a grip shell 300, a water storage unit 400, a driving mechanism 200, and a pump 100. The grip shell 300 is the gripping part when the user uses the oral irrigator for cleaning, and it contains most of the components that realize the cleaning function. The pump 100, the driving mechanism 200, and the water storage unit 400 are all arranged in the grip shell 300, and the grip shell 300 may also be provided with circuit boards, pipelines and other structures.

[0117] As described in the first embodiment, the pump 100 includes a water inlet channel 7 and a water outlet channel 8 connected to the fluid pumping chamber 20. A nozzle 500 is connected to the end of the gripping shell 300, and the nozzle 500 is connected to the water outlet channel 8, so that the pulse fluid pumped out of the water outlet channel 8 can be sprayed from the nozzle 500 to achieve the function of flushing the gaps between teeth.

[0118] The water storage unit 400 is disposed in the grip housing 300, and is used to store fluids such as clean water, mouthwash, and oral care liquid. The water outlet of the water storage unit 400 is connected to the water inlet channel 7. Under the action of the driving mechanism 200, the volume of the fluid pumping chamber 20 in the pump 100 is configured to increase and decrease periodically, so that the liquid in the water storage unit 400 is pumped into the fluid pumping chamber 20 through the water inlet channel 7, and provides impact fluid through the water outlet channel 8.

[0119] The oral irrigator provided in this embodiment can provide impact fluid, thereby achieving the effect of cleaning the gaps between teeth. The center of mass of the eccentric member in the pump 100 is set on the output shaft 210 of the drive mechanism 200, so that the eccentric member does not generate unbalanced centrifugal force during rotation, thereby reducing the deflection of the output shaft of the drive mechanism. The drive mechanism 200 is not easy to heat up, the vibration noise is reduced, the bearings in the pump 100 are not easy to expand, and the service life is extended, thereby improving the user's experience of using the oral irrigator.

[0120] Embodiment 4

[0121] This embodiment provides an oral cleaner, and the pump 100 provided in the first or second embodiment can be applied to the oral cleaner provided in this embodiment. The oral cleaner is a cleaning device that can effectively remove bacteria and food residues on the tooth surface and in the gaps between teeth, and specifically, can be an integrated flushing device.

[0122] refer to Fig. 9 The oral cleaner comprises a gripping shell 300, a water storage unit 400, a brush head drive unit 700, a drive mechanism 200, and a pump 100. The gripping shell 300 is the gripping part when the user uses the oral cleaner for cleaning, and it contains most of the components for realizing the cleaning function. The pump 100, the drive mechanism 200, the brush head drive unit 700, and the water storage unit 400 are all arranged in the gripping shell 300, and circuit boards, pipelines and other structures may also be arranged in the gripping shell 300.

[0123] The end of the holding shell 300 is connected to the nozzle 500 and the brush head 600. Specifically, the nozzle 500 and the brush head 600 are located on the same side of the end of the holding shell 300. The brush head 600 has a plurality of contact element clusters, and the contact element clusters are formed by a plurality of contact elements being bundled together. The contact elements may be brush filaments, and the nozzle 500 may be located between the plurality of contact element clusters. As described in the first embodiment, the pump 100 includes a water inlet channel 7 and a water outlet channel 8 connected to the fluid pumping chamber 20. The nozzle 500 is connected to the water outlet channel 8, so that the pulse fluid pumped out by the water outlet channel 8 can be ejected from the nozzle 500 to achieve the function of flushing the gaps between teeth.

[0124] The brush head driving unit 700 is configured to drive the brush head 600 to swing so as to clean the teeth. The brush head driving unit 700 of this embodiment can drive the brush head 600 to swing, and at the same time, the pump 100 can supply liquid to the nozzle 500 through the water outlet channel 8, so that the oral cleaner of this embodiment not only has the brushing function of an electric toothbrush, but also has the rinsing function of an oral irrigator, so as to improve the user experience and improve the cleaning effect of the oral cleaner.

[0125] The water storage unit 400 is disposed in the grip housing 300, and is used to store fluids such as clean water, mouthwash, and oral care liquid. The water outlet of the water storage unit 400 is connected to the water inlet channel 7. Under the action of the driving mechanism 200, the volume of the fluid pumping chamber 20 in the pump 100 is configured to increase and decrease periodically, so that the liquid in the water storage unit 400 is pumped into the fluid pumping chamber 20 through the water inlet channel 7, and provides impact fluid through the water outlet channel 8.

[0126] The oral cleaner provided in this embodiment can provide impact fluid, thereby achieving the effect of cleaning the gaps between teeth. The center of mass of the eccentric member in the pump 100 is set on the output shaft 210 of the drive mechanism 200, so that the eccentric member does not generate unbalanced centrifugal force during rotation, thereby reducing the deflection of the output shaft of the drive mechanism. The drive mechanism 200 is not easy to heat up, the vibration noise is reduced, the bearings in the pump 100 are not easy to expand, and the service life is extended, thereby improving the user's experience of using the oral cleaner.

[0127] Embodiment 5

[0128] This embodiment provides an eccentric component, which can be applied to the pump 100 provided in the first or second embodiment.

[0129] refer to Figure 3 The eccentric member is provided with an axial hole 33, and the mass center of the eccentric member is located within the range of the axial hole 33. Preferably, the eccentric member can be an eccentric wheel 3. The axial hole 33 of the eccentric member can be connected to the output shaft 210 of the driving mechanism 200, and the eccentric member can rotate around the rotation center line under the drive of the output shaft 210 of the driving mechanism 200. It can be understood that the rotation center line of the eccentric wheel 3 is basically the central axis of the axial hole 33.

[0130] The center of mass of the eccentric member is located within the range of the shaft hole 33, which makes the centrifugal force generated by the eccentric member when it rotates tend to be balanced, and the eccentric member will not generate unbalanced centrifugal force during the rotation process, thereby reducing the deflection of the output shaft 210 of the drive mechanism 200. The output shaft 210 of the drive mechanism 200 is subjected to uniform force, thereby reducing its friction resistance, heat generation, and vibration noise.

[0131] In one embodiment of the present disclosure, the center of mass of the eccentric member is basically located on the central axis of the shaft hole 33. The central axis of the shaft hole 33 basically coincides with the rotation center line of the eccentric member, and the center of mass of the eccentric member is basically located on its rotation center line, thereby balancing the centrifugal force generated during its rotation. It should be noted that due to production errors, it cannot be guaranteed that the center of mass of the eccentric member will definitely fall on the central axis of the shaft hole 33, but may be at other positions within the error range. The maximum distance between the center of mass of the eccentric member and the central axis of the shaft hole 33 does not exceed the radius of the shaft hole 33. Preferably, the center of mass of the eccentric member is located on the central axis of the shaft hole 33, thereby ensuring the balance of centrifugal force when the eccentric member rotates.

[0132] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A pump, characterized in that: include: A housing (1), wherein a receiving cavity (10) is formed in the housing (1); and an intermediate plate (11) is fixedly arranged in the housing (1); A displacement mechanism (2) is arranged in the accommodating cavity (10); an end surface of the displacement mechanism (2) facing the first direction and the intermediate plate (11) enclose a fluid pumping cavity (20) with a variable volume; an eccentric member, arranged in the accommodating chamber (10), and configured to be drivingly connected to the end face of the displacement mechanism (2) facing the second direction; the eccentric member is configured to rotate around a rotation center line under the drive of an output shaft (210) of a driving mechanism (200), thereby driving the displacement mechanism (2) to reciprocate along the first direction and the second direction, so as to periodically increase and decrease the volume of the fluid pumping chamber (20); The center of mass of the eccentric member is located on the output shaft (210).

2. The pump according to claim 1, characterized in that The center of mass of the eccentric member is substantially located on the axis of the output shaft (210).

3. The pump according to claim 1, characterized in that Among the planes containing the rotation center line, at least one plane is a longitudinal section, so that the masses of the parts of the eccentric component located on both sides of the longitudinal section are basically the same.

4. The pump according to claim 1, characterized in that Among the planes containing the rotation center line, at least one plane is a symmetry plane, so that the eccentric component is arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane.

5. The pump according to claim 3 or 4, characterized in that The eccentric component is an eccentric wheel (3), and the eccentric wheel (3) is constructed to include a first component (31) and a second component (32) located on both sides of the longitudinal section, and the center of the eccentric wheel (3) is located at the second component (32): The first component (31) is configured to have a material addition; and / or, The second component (32) is configured to have a removal chute.

6. The pump according to claim 5, characterized in that The de-materializing grooves are provided in plurality, and the plurality of de-materializing grooves are configured to be arranged on the second component (32) at intervals along the circumferential direction of the eccentric wheel (3); and / or, The material removal trough is constructed in a fan-shaped shape concentric with the eccentric wheel (3); and / or, The material removal trough is constructed in a fan-shaped ring shape with a central angle of 90 degrees.

7. The pump according to claim 5, characterized in that The material increasing member is configured to be arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane; and / or, The material removal trough is constructed to be mirror-symmetrical with the symmetry plane as a reference plane.

8. The pump according to claim 7, characterized in that The second component (32) has a first material removal groove (321), and the first material removal groove (321) is configured to be arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane; and / or, The second component (32) has a second material removal groove (322) partially located on the first component (31), and the second material removal groove (322) is constructed to be arranged in a mirror-symmetrical manner with the symmetry plane as a reference plane.

9. The pump according to claim 8, characterized in that The first removal trough (321) is constructed to be concentric with the eccentric wheel (3); and / or, The second removal trough (322) is constructed to be concentric with the eccentric wheel (3); and / or, The first material removal trough (321) is configured in a fan-shaped shape; and / or, The second material removal trough (322) is configured in a fan-shaped ring shape; and / or, The first material removal trough (321) is constructed in a fan-shaped ring shape with a central angle of 90 degrees; and / or, The second material removal trough (322) is constructed in a fan-shaped ring shape with a central angle of 90 degrees.

10. The pump according to claim 5, characterized in that The material increasing component comprises a material increasing block (310) which is arranged on the first component (31) and extends outward along the outer circumference of the eccentric wheel (3).

11. The pump according to claim 10, characterized in that The material increasing block (310) is constructed as a fan-shaped ring concentric with the eccentric wheel (3); and / or, The material increasing block (310) is constructed in a fan-shaped ring shape with a central angle of 90 degrees.

12. The pump according to claim 10, characterized in that The material increasing blocks (310) are multiple: Among the plurality of material increasing blocks (310), at least two have different radii; and / or, Among the plurality of material increasing blocks (310), at least two have different thicknesses along the extension direction of the rotation center line.

13. The pump according to claim 10, characterized in that At least one slot (313) is provided on the material increasing block (310), and a counterweight block (314) is embedded in the slot (313); the specific gravity of the counterweight block (314) is configured to be greater than that of the material increasing block (310) and / or the eccentric wheel (3).

14. The pump according to claim 10, characterized in that A connecting rod (4) and a bearing (5) are also provided in the housing (1); the bearing (5) is configured to be sleeved on the eccentric wheel (3); the connecting rod (4) is configured to be transmission-connected between the displacement mechanism (2) and the eccentric wheel (3), and is configured to drive the displacement mechanism (2) to reciprocate along the first direction and the second direction under the driving action of the eccentric wheel (3).

15. The pump according to claim 14, characterized in that There are two material increasing blocks (310), which are respectively referred to as a first material increasing block (311) and a second material increasing block (312); the radius of the first material increasing block (311) is greater than that of the second material increasing block (312); A first step groove (315) is formed between the first material increasing block (311) and the second material increasing block (312); the connecting rod (4) is configured to be located at a position corresponding to the first step groove (315); A second step groove (316) is formed between the second material increasing block (312) and the first component (31); and the bearing (5) is configured to be located at a position corresponding to the second step groove (316).

16. An oral irrigator, characterized in that: include: A gripping shell (300), wherein an end of the gripping shell (300) is connected to a nozzle (500); A water storage unit (400) is arranged in the grip shell (300); A driving mechanism (200) is arranged in the holding shell (300); The pump (100) according to any one of claims 1 to 15, is arranged in the gripping housing (300); the pump (100) comprises a water inlet channel (7) and a water outlet channel (8) which are connected to the fluid pumping chamber (20); the nozzle (500) is connected to the water outlet channel (8); and the water outlet of the water storage unit (400) is connected to the water inlet channel (7); Under the action of the driving mechanism (200), the volume of the fluid pumping chamber (20) is configured to increase and decrease periodically, so that the liquid in the water storage unit (400) is pumped into the fluid pumping chamber (20) through the water inlet channel (7) and provides impact fluid through the water outlet channel (8).

17. An oral cleaning device, characterized in that: include: A gripping shell (300), wherein the end of the gripping shell (300) is connected to a nozzle (500) and a brush head (600); A water storage unit (400) is arranged in the grip shell (300); A brush head driving unit (700), wherein the brush head driving unit (700) is configured to drive the brush head (600) to swing so as to clean teeth; A driving mechanism (200) is arranged in the holding shell (300); The pump (100) according to any one of claims 1 to 15, is arranged in the gripping housing (300); the pump (100) comprises a water inlet channel (7) and a water outlet channel (8) which are connected to the fluid pumping chamber (20); the nozzle (500) is connected to the water outlet channel (8); and the water outlet of the water storage unit (400) is connected to the water inlet channel (7); Under the action of the driving mechanism (200), the volume of the fluid pumping chamber (20) is configured to increase and decrease cyclically, so that the liquid in the water storage unit (400) is pumped into the fluid pumping chamber (20) through the water inlet channel (7) and provides impact fluid through the water outlet channel (8).

18. An eccentric member, characterized in that: The eccentric component is provided with an axial hole (33); the center of mass of the eccentric component is located within the range of the axial hole (33).

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